How do scientists construct recombinant DNA molecules?
A.
by using RNA from plants
B.
by combining the RNA of two different organisms
C.
by combining the proteins from two different organisms
D.
by combining the DNA of two different organisms
A.
by using RNA from plants
B.
by combining the RNA of two different organisms
C.
by combining the proteins from two different organisms
D.
by combining the DNA of two different organisms
Proteins are manufactured from "blueprints" found on DNA. After they are translated, they are moved through a system of internal membranes before being distributed throughout the rest of the cell. At some point in this process, they are modified to their functional form.
a) Describe the movement of proteins from their manufacturing point through this internal membrane system.
b) In your own words, discuss the role of each of the following structures in the whole process: cell membrane, vesicles (at two points in the process), ribosomes, Golgi apparatus, and endoplasmc reticulum. Be sure to identify the correct order in which the proteins move through each of these structures.
Transcription which is DNA to RNA and then translation which is RNA to protein, but I’m not understanding how to answer these questions.
Any help would be appreciated. =]
Sorry for the topic mess up. It’s supposed to read I need help understanding how proteins are made.
Erika- I’m asking all of that. =]
Need someone really knows Biology!
Choose best answer.
Which statement correctly describes how life might have begun in the shallow seas under Earth’s primative atmosphere?
(a)In the Archean eon, when there was an absence of free oxygen, prokaryotic cells developed in the shallow seas. These cells got energy through fermentation and had self-replicating RNA and other organic molecules.
(b)Eurkaryotic cells were the first to develop in the shallow seas using fermentation to get energy. They were little more than memebrane bound, self replicationg RNA.
(c) Eubacteria cells were the first to develop in the shallow seas using photosynthesis to get their envergy. They were little mor ethan membrane bound, self-replicating DNA and other organic molecules.
(d) In the Precambrain eon, when there was an absence of free oxygen, stromatolite cells developed in the shallow seas. They got their energy from photosynthesis and had self-replicating DNA and other organic molecules.
1) manufacture of a new strand of DNA complementary to an old strand of DNA
2) manufacture of a strand of RNA complementary to a strand of DNA
3) modification of a strand of RNA prior to the manufacture of a protein
4) manufacture of a protein based on information carried by RNA
5) manufacture of two new DNA double helices that are identical to an old DNA double helix
Which one is correct?? Thanks TONS!!
1.Describe the steps involved in adding aminoacids to a polypeptide chain on a ribosome.
2.What is signal sequence and what is its significance in protein synthesis?
3.What would happen to translation if a ribosome skipped 1 or more codons? Explain.
4.What would happen to a translation if a ribosome skipped 1 or nucleotide? Explain.
5.How is the need for gene regulation in multicellular organisms different than in single-celled organisms?
6.You’re studying the rates of transcription and protein synthesis in plant cells growing in a tissue culture. You will do this by measuring the incorporation of radioactive isotopes into RNA and protein. What could you measure with radioactive phosphorus? Explain.
7.A polyribosome is several ribosomes attached to an mRNA molecule. Would the proteins manufactured by a polyribosome be different or the same? Explain
8.Explain the mechanism by which proteins that are to become part of a membrane are packaged and transported after translation.
Its basic biology
1) _________ is a nucleic acid base found in ribonucleic acid (RNA) but not in deoxyribonucleic acid (DNA).
A. Thymine
B. Guanine
C. Cytosine
D. Uracil
2) Which of the following is not an outcome of recombinant deoxyribonucleic acid (rDNA) technology?
A. Mass productions of human hormones by bacteria
B. Estimating the age of a rock sample
C. Increasing the production of hardier crops
D. Correcting a human disease
3) The Polymerase Chain Reaction (PCR) is a method of ________.
A. mass-producing proteins
B. speeding up the production of mRNA
C. making multiple identicle copies of small amounts of DNA
D. decoding the nucleotide sequence of a gene
4) Which of the following is NOT one of the domains of life on Earth?
A. prokarya
B. bacteria
C. archaea
D. eukarya
1. Place the following metabolic processes in an order that fits this hypothesis for the origin of life: Photosynthesis, Aerobic Respiration, Fermentation, Nucleic Acid replication (RNA or DNA), Membrane transport.
2. Which prokaryote is closer to the eukaryotes? List several reasons for your answer.
3. How has the Domain System altered our view of taxonomy?
These are based from the Cambell’s Ap Biology book (sixth edition).
a.) Ribosomes manufacture protein.
b.) RNA is formed from a gene.
c.) Part of a DNA molecule "unzips".
d.) RNA carries the genetic code into the cytoplasm.
e.) Amino acids attach to ribosomes.
Please help me! I need to know the correct answer!
Thanks!
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test 2:
a viruses’____ alows it to lock onto a host cell like a key in a lock.
a. protein coat
b.outer membrane
c. DNA
d.RNA
which of the following are not viruses:
a. ebola, hepatitis, polio
b. common cold, flu, aids
c. tetanus, diptheria, pertrussis
d. chicken pox, small pox, cow pox.
determine if the statement is true or false. if it is true say true. if it is false you must change the underlined wod to fix the sentence:
jonas salk worked on the rabies vaccine
—————
Radioactive or fluorescent-labeled RNA or single-stranded DNA pieces that are complementary to the gene of interest and are used to confirm the presence of a cloned gene are called
A. probes.
B. plasmids.
C. vaccines.
D. clones.
Which of the following procedures is not a usual step in a genetic engineering experiment?
A. inducing a mutation in a source chromosome
B. cleaving DNA with a restriction enzyme
C. recombining pieces of DNA from different species
D. cloning and screening target cells